Model Railway Forum

GR2208 wrote: ↑Tue May 03, 2022 8:58 am

Rog (RJ) wrote: ↑Mon May 02, 2022 6:52 pm I think this is something to do with the PWM frequency of the supply to the motor. Zimo set a relatively high frequency of 40KHz I think. There's a way to alter it via CVs but I can't tell you which, you should be able to find out from the very comprehensive decoder user manual.

Thanks i will check it out.

I have had a look at the online manual and it appears to be CV 9 in conjunction with CV 56.

Edit. Further reading suggests CV 112 may be the one to look at.
The Zimo decoders are very good but the manual is difficult to get to grips with (at least it is for me) and some CVs don't apply to all decoder versions.